What Do I Mean Compare Decimals? :

What Do I Mean Compare Decimals? When we compare we use terms such as:
Less than <
Greater than >
Equal to =
Comparing decimals is similar to comparing whole numbers.
45<47
150>105
When we compare decimals we use place value or a number line.

Place Value :

Slide 6:

Compare Sara’s score with Danny’s score.
Line Up Decimal Points
Sara: 42.1
Danny: 42.5
Start at the left and find the first place where the digits differ. Compare the digits
1<5
42.1<42.5
This means Sara’s score was lower than Danny’s score. Half pipe Results

Let’s Try Using A Number Line :

Let’s Try Using A Number Line 42.0 42.1 42.5 Numbers to the right are greater than numbers to the left. Since 42.5 is to the right of 42.1 we have:
42.5>42.1

Slide 8:

Half pipe Results 1 2 5 4 3

Equivalent Decimals :

Equivalent Decimals Decimals that name the same number are called equivalent decimals.
0.60 and 0.6
Are these the same???

Slide 10:

0.60 0.6 =

Annexing Zeros :

Annexing Zeros This means placing a zero to the right of the last digit in a decimal.
0.6 0.60
Although we added a zero, the value of the decimal did not change!!
Annexing or adding zeros is useful when ordering a group of decimals.

Ordering Decimals :

Ordering Decimals We can order decimals from least to greatest or we can order from greatest to least.
Let’s try an example:
Order 15, 14.95, 15.8, and 15.01 from least to greatest